package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;

import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private SetmealService setmealService;

    @Autowired
    private DishService dishService;
    /**
     * 删除分类，删除前需要判断当前分类是否可以删除
     *
     * @param id
     */
    @Override
    public void remove(Long id) {
        //查询套餐表
        LambdaQueryWrapper<Setmeal> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(queryWrapper1);
        if (count1 > 0) {
            //有套餐关联了当前分类,不能输出抛出异常
            throw new CustomException("当前分类关联了套餐,不能删除");
        }
        //查询菜品表
        LambdaQueryWrapper<Dish>queryWrapper2=new LambdaQueryWrapper<>();
        queryWrapper2.eq(Dish ::getCategoryId,id);
        int count2 = dishService.count(queryWrapper2);
        if (count2 > 0) {
            //有菜品关联了当前分类,不能输出抛出异常
            throw new CustomException("当前分类关联了菜品,不能删除");
        }
        //删除分类表中的数据
        this.removeById(id);
    }


}
